In a large pot drizzle the bottom with olive oil and cook the onions and red peppers over medium high heat for 5-7 minutes. Add the garlic, chili powder, cumin and red pepper flakes and mix together.
Add the tomato paste, tomatoes, stock, beans, oregano and chicken. Salt and pepper. Simmer this mixture for about an hour. (add more stock if needed)
Serve with any of the following, avocado, cheese, red onions, sour cream, more cheese, scallions, did I mention you can add cheese?